How to parse JSON Array Objects with SwiftyJSON? - ios

Question

I have a JSON file which contains list of array objects. I'm unable to parse that json file
I have tried this code but it didn't work
if let tempResult = json[0]["sno"].string{
print("Temp Result is \(tempResult)")
}
else {
print(json[0]["sno"].error!)
print("Temp Result didn't worked")
}
Here is my JSON File
[
{
"sno": "21",
"title": "title 1",
"tableid": "table 1"
},
{
"sno": "19",
"title": "title 222",
"tableid": "table 222"
},
{
"sno": "3",
"title": "title 333",
"tableid": "table 333"
}
]

Answer 1

Actually it would be better to define a struct for object in Array.
public struct Item {
// MARK: Declaration for string constants to be used to decode and also serialize.
private struct SerializationKeys {
static let sno = "sno"
static let title = "title"
static let tableid = "tableid"
}
// MARK: Properties
public var sno: String?
public var title: String?
public var tableid: String?
// MARK: SwiftyJSON Initializers
/// Initiates the instance based on the object.
///
/// - parameter object: The object of either Dictionary or Array kind that was passed.
/// - returns: An initialized instance of the class.
public init(object: Any) {
self.init(json: JSON(object))
}
/// Initiates the instance based on the JSON that was passed.
///
/// - parameter json: JSON object from SwiftyJSON.
public init(json: JSON) {
sno = json[SerializationKeys.sno].string
title = json[SerializationKeys.title].string
tableid = json[SerializationKeys.tableid].string
}
}
And you need to map your array of JSON to Item objects.
var items = [Item]()
if let arrayJSON = json.array
items = arrayJSON.map({return Item(json: $0)})
}

Answer 2

Ditch SwiftyJSON and use Swift's built-in Codable with model objects instead:
typealias Response = [ResponseElement]
struct ResponseElement: Codable {
let sno, title, tableid: String
}
do {
let response = try JSONDecoder().decode(Response.self, from: data)
}
catch {
print(error)
}
where data is the raw JSON data you got from your API.